Adafruit 8-channel Bi-directional Level Converter - TXB0108
18977
8.00
USD
Qty
Price
1
$8.00 ea.
2+
$7.20 ea.
Because the Arduino (and Basic Stamp) are 5V devices, and most modern sensors, displays, flash cards and modes are 3.3V-only, many makers find that they need to perform level shifting/conversion to protect the 3.3V device from 5V.
Description [Hide]
When making different devices talk, they can often be expecting/talking different voltages. This can be a bad thing, causing damaged chips that are being YELLED at by the more powerful device. You can make a simple converter with resistors and a transistor, but high speed transfers need cleaner signals than the resistor solution can offer.
That's where this lovely chip, the TXB0108 bi-directional level converter comes in! This chip perform bidirectional level shifting from pretty much any voltage to any voltage and will auto-detect the direction. Only thing that doesn't work well with this chip is i2c (because it uses strong pullups which confuse auto-direction sensor). If you need to use pullups, you can - but they should be at least 50K ohm, so the internal pullups in AVRs/Arduino will work fine.
Documentation [Hide]
- [Data Sheet]: TXB0108 Datasheet - Feb 2010
- [Documentation]: TXB0108 App note detailing how it works! - March 2010
You Might Also Like [Hide]
50550
Logic Level Converter
The SparkFun logic level converter is a small device that safely steps down 5V signals to 3.3V and steps up 3.3V to 5V. This level converter also works with 2.8V and 1.8V devices.
$1.95 USD
50512
FTDI Basic Breakout (5V)
This is a basic breakout board for the FTDI FT232RL USB to serial IC. The pinout of this board matches the FTDI cable to work with official Arduino and cloned 5V Arduino boards.
$14.95 USD
17145
3.3V Regulator TO-220 Pkg
Look, it's another voltage regulator! Look at it go! Vroom, vroom! (They go vroom, right?)
$2.05 USD
21035
Breadboard Jumper Wire Bundle
This 70-piece flexible wire jumper kit is sure to replace your old-style solid-wire jumpers. These are more flexible, robust, and easy to use!
$6.00 USD
39250
Solarbotics Synapse-to-FTDI Adapter Kit
This board can do it all - break out the Synapse RF module pins, give you a USB port/FTDI chip to program, supply it with a regulated 3.3V, integrate a reset switch (for updating & erasing), and also give you mounting options.
$22.95 USD
50572
SparkFun USB to RS-485 Converter
This breakout board pairs an SP3485 RS-485 transceiver with an FT232RL USB UART IC to convert a USB stream to RS-485.
$19.95 USD
30010
RS-232 Driver Module - DTE Version
The DTE RS-232 module is a tight and tidy way to convert RS-232 (computer-level) signals down to a microcontroller level signal strengths. DTE means it's configured as a "Data Terminal Equipment" (with 9 pins).
$11.95 USD
21197
Parallax USB to Serial RS-232 Adapter
The Parallax USB to RS-232 is a great little adapter that takes your mini-USB connector and converts it to a RS-232 interface!
$16.99 USD
$0.20 USD
90010
Learn to Solder Herbie
The latest version of the Solarbotics Herbie the MouseBot, now with tools for the seamless build.
$66.35 USD